更改更新阿里源
https://developer.aliyun.com/mirror/ubuntu?spm=a2c6h.13651102.0.0.3e221b11LaxkN2
1. 打开sources.list
sudo vi /etc/apt/sources.list
2. 更改sources.list
根据Ubuntu对应的版本更新源，例如20.04.1-Ubuntu
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb http
